package com.tongle.frs.common.util.security;

import com.tongle.frs.common.log.HiwiLog;
import com.tongle.frs.common.log.HiwiLogFactory;

import java.security.MessageDigest;

public class MD5Util
{
  private static HiwiLog log = HiwiLogFactory.getLogger(MD5Util.class);

  public static String MD5(String s)
  {
    try
    {
      byte[] bInput = s.getBytes("UTF-8");

      return MD5(bInput);
    } catch (Exception e) {
      log.error("======MD5加密失败====");
    }
    return null;
  }

  public static String MD5(String s, String encoding)
  {
    try
    {
      byte[] bInput = s.getBytes(encoding);

      return MD5(bInput);
    } catch (Exception e) {
      log.error("======MD5加密失败====");
    }
    return null;
  }

  public static String MD5(byte[] bytes)
  {
    char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
    try
    {
      MessageDigest md = MessageDigest.getInstance("MD5");
      md.update(bytes);
      byte[] b = md.digest();
      int j = b.length;
      char[] str = new char[j * 2];
      int k = 0;
      for (int i = 0; i < j; i++) {
        byte byte0 = b[i];
        str[(k++)] = hexDigits[(byte0 >>> 4 & 0xF)];
        str[(k++)] = hexDigits[(byte0 & 0xF)];
      }
      return new String(str);
    } catch (Exception e) {
      log.error("======MD5加密失败====");
    }
    return null;
  }

  public static byte[] Md5Byte(String s)
  {
    try
    {
      MessageDigest md5 = MessageDigest.getInstance("MD5");
      return md5.digest(s.getBytes("UTF-8"));
    } catch (Exception e) {
      log.error("======MD5加密失败====");
    }
    return null;
  }
}